Re: [RFC PATCH v1 00/11] Create fast idle path for short idle periods

[Arjan van de Ven]

On 7/20/2017 5:50 AM, Paul E. McKenney wrote:
> To make this work reasonably, you would also need some way to check for
> the case where the prediction idle time is short but the real idle time
> is very long.

so the case where you predict very short but is actually "indefinite", the real
solution likely is that we set a timer some time in the future
(say 100msec, or some other value that is long but not indefinite)
where we wake up the system and make a new prediction,
since clearly we were insanely wrong in the prediction and should try
again.

that or we turn the prediction from a single value into a range of
(expected, upper bound)

where upper bound is likely the next timer or other going-to-happen events.